Home EMS Acrel Household Solar Storage System Solution

The global trend of light storage integration is obvious, and the potential of the household energy storage market is huge, especially in the context of the continuous development of photovoltaic and the increase in penetration rate, household light storage integration has become the mainstream development direction

 

The main factors for the rise of household light storage systems include the following:

• Electricity price fluctuations：Changes in energy prices triggered an increase in electricity prices.
• Increased awareness of environmental protection：Household solar storage systems provide a clean and renewable source of energy.
• Policy support and subsidies: Many countries and regions offer tax breaks, subsidies and other incentives

 

Country or Region	Policy
South Australia	10kWH energy storage subsidy of AUD 5,000
Greece	The subsidy for energy storage capacity is 600 to 890 euros per kilowatt-hour, equivalent to a subsidy of 90%-100%.
Germany	Total subsidy amount is approximately 30 million euros
Spain	Plans to provide 160 million euros in subsidies for energy storage projects
Malaysia	Provides RM1,000 to RM4,000/kWAC for residential PV systems
Japan	Provides 70,000 yen/kW subsidy for photovoltaic systems

 

• Reduced construction costs：The cost of photovoltaic panels and batteries has been significantly reduced, making household light storage systems more affordable.

• Technology maturity：PV panels are more efficient, storage batteries last longer, and systems are more reliable and efficient.

Household photovoltaic storage systems are experiencing rapid growth in the international market, especially in countries and regions with favorable policy environments, high electricity prices, and a strong demand for renewable energy. With over 200GW of solar power capacity in Europe by 2023, the installation of home energy storage systems is exploding. It is predicted that by 2025, the installed capacity of household solar storage systems in Europe will reach 12.8GWh.

 

The main needs of home users for optical storage systems include: 

1. Responding to dynamic tariffs

2. Shaving peaks and filling valleys, smoothing electricity loads, and obtaining revenue through the peak-valley price difference

3. As an emergency power supply when the power supply is unstable

4. Responding to governmental requirements for environmental protection and carbon emissions and new energy subsidy policies

5. Effectively increase the self-generation and self-consumption rate of early-built photovoltaic power generation

II. Scope of system design

Household users have the characteristics of "small power consumption, large number of users, complex composition", users only know the situation of electricity consumption when they receive the monthly electricity bill, coupled with the fact that the general public does not understand the demand-side management of electricity, even if they want to adjust the way of electricity consumption, it is difficult to do so, and there are only a limited number of ways to save money on electricity. Residential PV storage systems can improve the ability of power dispatch, peak shaving and valley filling, maximize the use of energy and optimize the cost of electricity.

The main components of the household light and storage system include the photovoltaic system, the energy storage system, the household load and the household energy controller.

 

• Photovoltaic storage system

Photovoltaic and storage inverter: Converts DC power from photovoltaic or storage batteries to AC power for interfacing with the grid or household loads.

• Grid and Household Loads
• Bi-directional metering: A meter installed at the point of connection between the household grid and the public grid, i.e., the "grid interface" or "point of connection", usually inside the meter box or near the household's main circuit breaker, which measures the amount of electricity that the household consumes from the grid (forward metering) and sends to the grid (reverse metering). It measures the electricity that the household both consumes from the grid (forward metering) and delivers to the grid (reverse metering).
• Household Load: The load of a household consists mainly of a variety of appliances and equipment, including lighting systems, air conditioning and heating, laundry equipment, security systems, car charging piles, and so on. 
• Household Energy Controller
• Coordinate energy flow between PV, storage and the grid to optimize energy use, including planning curves, peak shaving and valley filling, and new energy consumption.

III Acrel Home EMS solutions

 

Benefits for home users include:

1. Improvement of PV consumption: real-time regulation of energy storage charging and discharging; when the household load is low, it can be used as a reservoir for residual PV power generation; when the load is high and the PV power generation is insufficient, it can be discharged, thus lowering the household electricity bill;
2. peak-to-valley spread arbitrage: utilizing the grid's peak and valley tariff differentials to help householders capture revenue, charging at valley tariffs and discharging at peak tariffs;
3. Avoid electricity bill overcharge: when the household electricity consumption peaks, activate the energy storage and discharge to reduce the household electricity bill. If the reserve power is insufficient through APP push, SMS push advance warning;
4. Reserve power for the family in case of emergencies: Since most countries do not have a stable grid supply and are prone to blackouts, energy storage batteries are always available for emergency power, allowing for seamless operation of the family's electricity supply;
5. Environmental protection statistics: governments are paying more and more attention to environmental protection, carbon emission subsidies for the future, and the contribution of green electricity use in the family to the green environment can be seen on the APP.

IV. Home EMS Platform Functions

4.1 Integrated Family Management

4.1.1 Home Energy Overview

 

4.1.2 Comprehensive energy statements

 

 

4.1.3 Statement of comprehensive income

 

4.2 Error alarm

4.2.1 Alarm record

 

4.2.2 Alarm analysis

 

4.3 Mobile APP

4.3.1 Homepage

 

4.3.2 Data Monitoring

4.3.3 Data statistics

 

 

Main Hardware

5.1 Household Energy Controller

Name	Picture	Communication method	Function	Application
Anet Household Energy Controller		WiFi/4G/Ethernet	Embedded linux system, network communication with socket mode, support for XML format compression upload, to provide AES encryption and MD5 authentication and other security requirements, support for intermittent continuous transmission, support for Modbus RTU, Modbus TCP, MQTT and other protocols.	Applied to inverters, converters, metering instruments and meteorological data collection and uploading cloud platforms.

 

 

5.2 Measuring device

Name	Picture	Model	Communication method	Function	Application
Bidirectional metering meters		ADW300	RS485/WiFi/4G	Realize the demand for itemized power metering, operation and maintenance supervision or power monitoring for different areas and different loads.	Metering of three-phase active energy in low-voltage networks.
Reverse Current Detection Meters		ADL200N-CT(single phase)/ADL400N-CT (three-phase)	RS485	Fast reverse current detection, metering of active and reactive power, support for forward and reverse power metering, in line with CE/UL/MID standards	Real-time monitoring of the flow of power at the grid point

 

 

5.3 Charging equipment

Name	Picture	Model	Communication method	Function
AC Vehicle Charging Post		AEV300-AC007D-EU	Bluetooth/WiFi/4G	Intelligent monitoring, smart metering, cloud platform connectivity, protection features, remote upgrade and wide range of vehicle model adaptations, supporting Bluetooth and IC card swipe activation